Sodium silicate gelants for water management in naturally fractured hydrocarbon carbonate formations

Hatzignatiou, D.G.; Giske, Nils Harald

doi:10.1016/j.cherd.2017.11.041

Cited by 13 publications

(3 citation statements)

References 24 publications

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“…Nano‐silica is a typical representative, and the polymer is formulated in a specific ratio to synthesize high temperature resistant, high strength and easily degradable gel plugging agent 44–48 . To further improve the performance of chemical gel plugging agents, researchers have synthesized high‐performance gel plugging agents by modifying silica 49–52 . These studies have achieved remarkable results in conventional reservoir dissection and plugging, but there are few relevant research results in high performance plugging agents that can meet the requirements of pressurized operations.…”

Section: Introductionmentioning

confidence: 99%

“…[44][45][46][47][48] To further improve the performance of chemical gel plugging agents, researchers have synthesized high-performance gel plugging agents by modifying silica. [49][50][51][52] These studies have achieved remarkable results in conventional reservoir dissection and plugging, but there are few relevant research results in high performance plugging agents that can meet the requirements of pressurized operations.…”

Section: Introductionmentioning

confidence: 99%

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Research and performance evaluation of modified nano‐silica gel plugging agent

Zheng

Luo

2023

J of Applied Polymer Sci

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Due to the difficulties in plugging high-pressure injection wells, the short period of plugging, and the use of modified nano-silica, a novel chemical gel plugging agent has been created. Modification of silica using silane coupling agents, and using the aqueous free radical polymerization method synthesized chemical plugging agent with AM, AA, and DMDAAC. The optimum synthesis conditions were screened by single-factor analysis: mass ratio m(AM):m (AA):m(DMDAAC) = 8:1.5:1, modified nano-silica concentration of 1.0%, total monomer mass concentration of 8.0%, initiator concentration of 0.3%, the cross-linker concentration of 0.4%, and coagulant concentration of 0.6%. The performance of the chemical plugging agent was evaluated under the target oil formation conditions. The experimental results showed that the chemical plugging agent exhibited good temperature resistance at 40-100 C, good salt resistance at mineralization (0.5-2.5) Â 10 4 mg/L, and the chemical plugging agent breaks through pressure gradients of 1.12, 15.42 and 90.15 MPa/m in the wellbore, fracture and core, respectively, compared with most gel plugging agents, this plugging agent is more suitable for sealing with pressure work. After adding the breakout agent, the fluid after breakout is fluid-like with low viscosity, which is convenient for reverse discharge and will not cause harm to the reservoir and ensure the subsequent normal construction operation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research and performance evaluation of modified nano‐silica gel plugging agent

Zheng

Luo

2023

J of Applied Polymer Sci

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“…As one of the important methods to improve oil and gas recovery by chemical drive in tertiary oil recovery [1,2], the main mechanism of polymer drive technology relies on increasing the viscosity of the replacement phase and reducing the permeability of the reservoir to reduce the flow ratio [3,4], thus increasing the wave efficiency and improving the oil drive effect [5,6]. As a low cost-effective recovery method [7][8][9], it has been widely used in oil fields on land [10][11][12] and sea [13,14], and the effect of development is remarkable [15,16].…”

Section: Introductionmentioning

confidence: 99%

Exploration of Super-Gravity Rapid Dissolution Method of Polymer for Offshore Oil Repellent

Zheng

Luo

et al. 2022

Processes

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The long dissolution time and large dispensed volumes of oil repellent polymers in offshore oil fields lead to a great increase in the volume and number of dissolution and maturation tanks in the polymer formulation system. However, there is limited space and load-bearing capacity at the offshore platform and only a small space is available for the dispensing system. To further optimize the polymer dispensing system and reduce its floor space, the super-gravity technology may be considered as a way to speed up the dissolution of the polymer. The mechanism of super-gravity rapid dissolution was investigated by establishing mathematical models and with indoor experiments. The effects of filler pore size and super-gravity factor on polymer dissolution time and solution viscosity were investigated using the super-gravity rapid dissolution device, then combined with established graded forced stretching devices for field magnification experiments. The results indicated that the super-gravity method can substantially shorten the polymer dissolution time. The basic dissolution time of the polymer AP-P4 was shortened by 35 min compared with the conventional formulation method after use of the super-gravity rapid dissolution device. The optimal process conditions for the preparation of polymer solution by the super-gravity rapid dissolution device were selected as the optimal super-gravity factor range of 1031~1298.

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